Just pointing out that soothing mists mana cost has been reduced, not increased. On live it's 1% of base mana, it got reduced to 0.66667% in a previous ptr build, and now it's been put to 0.726%, so still more than a 25% mana cost reduction compared to live: it's a freaking buff.
But I guess it's more fun to just look at this build's nerfs without taking into account the previous buffs.

You are right, I missed that one. But anyway, they could remove the mana cost entirely and the spell still would be unreliable as a chi generator, which is what monks miss more when coming to tank healing.

Wow. :| Looks like MWs just had a massive dump dropped on them. Wonder what caused all of this?

Windwalker Monks were healing for a lot in PvP. They could heal for nearly half their health in a matter of 2 secs with just a single Chi Wave while in melee range. I don't know why Chi Burst was nerfed though.